Post-hole borer



.(No Model.)

H. LANDIN. Post H'ole Borer. No. 234,992. Patented Nov. 30, 1-880.

WITNESSES: INVENTQR;

4 ORNEYS."

NPEPERSI PHOTO-LITMDGRAPHER. WASNXNGTON. D C.

UNITED STATES PATENT OFFICE.

HENRY LANDIN, OF FOREST, OHIO.

POST-HOLE BORER.

SPECIFICATION forming part of Letters Patent No. 234,992, dated November 30,1880.

Application filed June 9. 1880. (No model.)

To all whom it may concern.

Be it known that I, HENRY LANDIN, of Forest, in the county of Hardin and State of Ohio, have invented a new and useful Improvement in Post-Hole Borers, ofwhich the following is a specification.

The invention consists in a yoke having toes, in combination with a divided nut and slotted bench, and a cord and hook combined with a shaft, gearing, and boring-shaft, as hereinafter described and claimed.

In the accompanying drawings, Figure l is a side elevation of an apparatus embodying my improvements. Fig. 2 is a vertical section taken in the line a: 00 of Fig. 1. Fig. 3 is a horizontal section taken in the line 3 y of Fig. 2. p

Similar letters of reference indicate corresponding parts.

A represents a bench, provided with a seat for the operator. From this bench rise two standards, B, connected at their upper ends by a cross-bar, C. The standards B are slotted, and in the slots work the ends of a sliding cross head, E, in the upper portion of which is journaled a horizontal shaft, D, provided with two cranks, f, and carrying a bevelgear wheel, G. At about the center of the cross-head E is journaled the upper end of a vertical shaft, H, which is screw-threaded for nearly its entire length. This shaft works in a divided nut consisting of two internally threaded jaws, J J pivoted on the bench A, and held in place by a yoke, L, at the lower ends of which are toes l Z.' In the bench A, on either side of the jaws J J are slots 8, of such shape as to allow the toes I to pass through them and then engage with the under side of the bench, in order .to lock the jaws J J.

The lower end of the shaft H carries a boring-tool of any suitable description, and its upper end carries a bevel-gear wheel, M, driven by the wheel G.

The operator sits on the bench and operates the borer by turning the cranksf. When the desired depth has been reached the yoke Lis removed andthe j awsJ J are separated, so as to clear the threads of the boring-shaft H, which is then raised by attaching to asquared portion of the horizontal shaft 1) a hook, R, carried by a cord, P, suspended from the crossbar 0, and continuing the motion of the cranks, so as to wind said cord P around said shaft D.

Having thus described myinvention, I claim as new and desire to secure by Letters Patent- The yoke L, having the toes l, in combination with the divided nut J J and the bench A, provided with the slot .9, as shown and described, for the purpose specified.

2. The cord P and hook R, in combination with the shaft D and the gearing and boringshaft operated thereby, as shown and described, for the purpose specified.

HENRY LANDIN. Witnesses:

L. E. 000K,

W. T. GEMMILL. 

